html {
    height: 100%;
    body {
        height: 100%;
        background-color: #f4f4f4;
        .index {
            max-width: 750px;
            min-width: 300px;
            margin: 0 auto;
            position: relative;
            .topbar {
                width: 100%;
                height: 1.066666rem;
                background-color: #fff;
                text-align: center;
                a {
                    float: left;
                    display: block;
                    width: 10%;
                    height: 100%;
                    i {
                        display: block;
                        font-size: 0.466666rem;
                        line-height: 1.066666rem;
                    }
                }
                p {
                    float: left;
                    display: block;
                    width: 80%;
                    margin-right: 10%;
                    font-size: 0.466666rem;
                    line-height: 1.066666rem;
                }
            }
            .select_list {
                width: 100%;
                margin-top: 0.1rem;
                background-color: #fff;
                .select_bar {
                    float: left;
                    margin: 2% 4%;
                    font-size: 0.32rem;
                    border-radius: 15px;
                    text-align: center;
                    width: 15%;
                    display: inline-block;
                    padding: 0 2%;
                    height: 0.8rem;
                    line-height: 0.8rem;
                    background-color: #f2f2f2;
                }
                .active {
                    background-color: #009688;
                    color: #fff;
                }
            }
            .tool-list{
                width: 94%;
                margin: 0.2rem auto;
                .tool{
                    width: 48%;
                    margin: 0.2rem 1%;
                    float: left;
                    background-color: #fff;
                    border-radius: 5px;
                    position: relative;
                    .mask{
                        width: 100%;
                        height: 100%;
                        border-radius: 5px;
                        background-color: rgba(0,0,0,0.6);
                        position: absolute;
                        top: 0;
                        left: 0;
                        display: none;
                        img{
                            display: block;
                            margin: 40% auto 0;
                            width: 1.466666rem;
                            
                        }
                    }
                    >img{
                        display: block;
                        max-width: 90%;
                        height: 4rem;
                        margin: 0.2rem auto;
                    }
                    >p{
                        display: block;
                        height: 0.5rem;
                        line-height: 0.5rem;
                        text-align: center;
                        font-size: 0.386666rem;

                         color: #1c1b21;
                         //padding: 0.2rem 0;
                    }
                }
                .active{
                    .mask{
                        display: block;
                    }
                }
            }
                .btn{
                width: 83%;
                letter-spacing: 0.2em;
                padding-left: 2%;
                line-height: 2.5;
                margin: 0.5rem auto;
                font-size: 0.48rem;
                color: #fff;
                text-align: center;
                background-color: #009688;
                border-radius: 3px;
            }
        }
    }
}